<template>
  <el-pagination
    :background="background"
    :current-page.sync="currentPage"
    :page-size.sync="pageSize"
    :layout="layout"
    :page-sizes="pageSizes"
    :total="total"
    v-bind="$attrs"
    @size-change="handleSizeChange"
    @current-change="handleCurrentChange"
    small
  />
</template>

<script>
import { scrollTo } from '@/utils/scrollTo'

export default {
  name: 'Pagination',
  props: {
    total: {
      required: true,
      type: Number
    },
    page: {
      type: Number,
      default: 1
    },
    limit: {
      type: Number,
      default: 20
    },
    pageSizes: {
      type: Array,
      default() {
        return [10, 20, 30, 50, 100]
      }
    },
    background: {
      type: Boolean,
      default: true
    },
    autoScroll: {
      type: Boolean,
      default: true
    }
  },
  computed: {
    layout() {
      return this.total ? 'total,sizes, prev, pager, next, jumper' : 'total'
    },
    currentPage: {
      get() {
        return this.page
      },
      set(val) {
        this.$emit('update:page', val)
      }
    },
    pageSize: {
      get() {
        return this.limit
      },
      set(val) {
        this.$emit('update:limit', val)
      }
    }
  },
  methods: {
    handleSizeChange() {
      this.$emit('pagination')
      if (this.autoScroll) {
        scrollTo(0, 800)
      }
    },
    handleCurrentChange() {
      this.$emit('pagination')
      if (this.autoScroll) {
        scrollTo(0, 800)
      }
    }
  }
}
</script>
